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  /*!
    \class SoTransparencyElement Inventor/elements/SoTransparencyElement.h
    \brief The SoTransparencyElement is yet to be documented.
  
    \ingroup elements
  
    FIXME: write doc.
  */
  
  #include <Inventor/elements/SoTransparencyElement.h>
  
  #include "SbBasicP.h"
  
  #include <Inventor/elements/SoLazyElement.h>
  #include <cassert>
  
  
  SO_ELEMENT_SOURCE(SoTransparencyElement);
  
  /*!
    \copydetails SoElement::initClass(void)
  */
  
  void
  SoTransparencyElement::initClass()
  {
    SO_ELEMENT_INIT_CLASS(SoTransparencyElement, inherited);
  }
  
  /*!
    Destructor.
  */
  
  SoTransparencyElement::~SoTransparencyElement()
  {
  }
  
  // Doc from superclass
  
  void
  SoTransparencyElement::init(SoState * stateptr)
  {
    inherited::init(state);
    this->state = stateptr;
  }
  
  //! FIXME: write doc.
  
  void
  SoTransparencyElement::set(SoState * const state, SoNode * const node,
                             const int32_t numvalues,
                             const float * const values)
  {
    SoTransparencyElement * elem = const_cast<SoTransparencyElement *>
      (
       SoTransparencyElement::getInstance(state)
       );
  
    SoLazyElement::setTransparency(state, node, numvalues, values, &elem->colorpacker);
  }
  
  //! FIXME: write doc.
  
  //$ EXPORT INLINE
  int32_t
  SoTransparencyElement::getNum(void) const
  {
    SoLazyElement * lazy = SoLazyElement::getInstance(this->state);
    return lazy->getNumTransparencies();
  }
  
  //! FIXME: write doc.
  
  float
  SoTransparencyElement::get(const int index) const
  {
    return SoLazyElement::getTransparency(this->state, index);
  }
  
  /*!
    Returns a pointer to the transparency values. This method is not part of the OIV API.
  */
  const float *
  SoTransparencyElement::getArrayPtr(void) const
  {
    SoLazyElement * lazy = SoLazyElement::getInstance(this->state);
    return lazy->getTransparencyPointer();
  }
  
  //! FIXME: write doc.
  
  const SoTransparencyElement *
  SoTransparencyElement::getInstance(SoState *state)
  {
    return coin_assert_cast<const SoTransparencyElement *>
      (
       state->getElementNoPush(classStackIndex)
       );
  }
  